13221838 has 8 divisors (see below), whose sum is σ = 22666032. Its totient is φ = 5666496.

The previous prime is 13221827. The next prime is 13221863. The reversal of 13221838 is 83812231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472195 + ... + 472222.

It is an arithmetic number, because the mean of its divisors is an integer number (2833254).

Almost surely, 2^13221838 is an apocalyptic number.

13221838 is a deficient number, since it is larger than the sum of its proper divisors (9444194).

13221838 is an equidigital number, since it uses as much as digits as its factorization.

13221838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944426.

The product of its digits is 2304, while the sum is 28.

The square root of 13221838 is about 3636.1845387714. The cubic root of 13221838 is about 236.4634076645.

It can be divided in two parts, 1322 and 1838, that added together give a triangular number (3160 = T₇₉).

The spelling of 13221838 in words is "thirteen million, two hundred twenty-one thousand, eight hundred thirty-eight".